NEW ALTERNATOR FITS 1999-2000 MAZDA MIATA 1.8L BP4W-18-300B BP4W-18-300C AL4226X 0-986-045-551 0986045551 210-3155 2103155 LR170-758 LR170758 BP4W-18-300B BP4W-18-300C BP4W18300B BP4W18300C 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Alternator - Voltage: 12V Amperage: 70 Amps Regulator: Internal Grooves: 3 Source: Aftermarket